Bed nets were hailed as the solution to the malaria epidemic killing thousands of children in tropical parts of the world. But now, years after they were distributed en masse, the mosquitos have developed resistance and the bed nets have holes. In other words, they're not working so well any more.

Bed nets were hailed as the solution to the malaria epidemic killing thousands of children in tropical parts of the world. But now, years after they were distributed en masse, the mosquitos have developed resistance and the bed nets have holes. In other words, they're not working so well any more.

Bed nets were hailed as the solution to the malaria epidemic killing thousands of children in tropical parts of the world. But now, years after they were distributed en masse, the mosquitos have developed resistance and the bed nets have holes. In other words, they're not working so well any more.